cuccurullo



A. CUCCURULLO.

FIREARM.

APPLICATlON FILED DEC. 27, |915.

Patented Aug. 8, 1916. 16@

1&98976.

santas na'.

FIRERM.

masses.

Specification of Letters Eatent.

Patented Aug. 8, 1216.

Application led December 27, 1915. Serial No. S.

To all whom it may concern.:

ing at Brecia, italy, have invented certain new and useful improvements in Firearms, of which the following. is a speciiication.

rihis invention relates to an improvement in automatic {ire-arms of the type in which the breech frame and block recoil on the body of the fire-arm after ring, and has or its object an arrangement for connecting the breech block withthe breech frame when the shot is being tired and releasing the same from said breech frame after tiring.

According to this invention the breech block is connected to the breech frame. by l means of a projection mounted on a locking arm pivoted on the breechrame said locking arm being caused to be swung by sultable means when the breech frame and block are recoiling so as to release said breech block and trarne from each other. Said means for causing the swinging of the locking arm may be in form oi' a slope provided on the body of the tire-arm, said slope being engaged by a tail of the locking arm when the breech block and frame are recoiling.

rihe annexed drawing shows by way of example an arrangement according to this invention, said arrangement being shown applied to an automatic pistoll for purpose of illustration, it being understood that the present invention may be appliedto any kind of fire-arms in which the breech block and frame recoil after firing.

In Said drawing Figure 1 is a longitudinal section of the upper portion of a pistol havin its parts in the ordinary position, Fig. 2 1s the same section with the parts in the position they occupy after firing; Fig. 3 is a rear view of the breech frame and Fig. 4 is a detail view showing one of the cheeks of the pistol body.

As shown in said gures the body comprises two cheeks 1, encircled by a slide 2 in which is mounted to reciprocate the breech frame 3 provided with the breech block 4. Said breech block 4 is provided in its lower portion with a notch 5 registering with an opening 6 provided in the lower portion of the breech trame, said opening and notch bein intended to be engaged by a tooth causing the breech frame and block to be solid with each other when this is required by the operation of the fire arm, that is when the shot is being tired. According to this invention said tooth is mounted at the end of a swinging arm 8 pivoted by means of a pin 9 on lugs 9 carried by the breech frame., saidarm 8 having a tail 10 opposite a slope 11 provided on the body 1. A spring 12 pushes the arm 8 in the position shown in Fig. 1, that is with its toothy 7 engaged in opening 6 and recess 5 so that said breech frame 3 and block 4rare solid with each other when the shot is being fired. After tiring the breech frame 3 is caused to recoil in the known manner, and then the tail 10 of arm 8 engages the slope 11 of body 1 and thus causes the arm 8 to rotate so as to withdraw the tooth 7 from notch 5, the breech block 4 being thus released from breech frame 3 and free to e'ect its backward stroke in order to eject the ired case and then to carry a fresh cartridge in the barrel during its .return stroke which is caused by springs (not shown).

When the breech frame has been restored in its ordinary position by spring 15, the locking arm 8 is carried in the position `shown in Fig. 1 by spring 12, so that it is ready to engage the breech block in order to cause it to be solid with the breech frame.

inthe pistol illustrated by way of example the tiring pin 16 is cocked before firing by an arm 13 engaging an arm 14 pivoted to said firing pin, said arm 13 being controlled by trigger 17, arm 18 and pin 19 engaging an opening 20 of said arm 18; in this case the arm 8 is provided with a longitudinal slot 8 'for allowing the end oarm 13 to reach arm 14.

According to this invention the body cheeks do not require to bJe provided with grooves for controlling the locking block as required in the known types so that their solidity is increased. Further the operation of the fire-arm is made more safe and it may be easily taken to' pieces as the breech trame and block are independent from the body, the

locking member being mounted on the breech frame.

it is to be' understood that the locking arm 8 may be operated by any other means than the slope 11 and that this invention may be applied to any kind of automatic fire-arms provided with recoiling breech frame and claim as my inventionand desire o secure by "United States Letters lijetent l'n an automatic fire-arm having recoiing reech frame and block, a, body, e breech rame reciprocating on the same, e breech llock reciprocating in the breech frame, en 'peiling in the breech frame and a notch in. he breech bolt Said opening and notch being ntended to register with eachother in the lrdinary position or" said parts, e spring conrolleci arm pivoted to the breech frame, a, rejection at one end of sein?. erm, seid proection being capable of engaging Seidl open meeee ing and notch, e, tail on the opposite enci of said erm, and a slope on the body of the 15 hre-arm, said slope coperating with said tail for swinging seid arm and withdrawing said projection from said notch when the breech frame recoils after ring.

lfm Witness whereof lk have signed this 20 specicetion in the presence of two Witnesses.

AYessmmeo oseooeemieo.

' Witness@ Meyer CARLOS, A iai-HUB P., Gomme,v 

